Lifting-jack.



No. 745,142. PATENTED NOV. 24, 1903.

I A. R. BOLIN &: J. B. GOPR.

' LIFTI NG JACK.

ABPLIOATIUN FILED APR. 10, 1903.

no MODEL.

lulllllm UNITED STATES Patented November 24, 1903.

PATENT OFFICE.

ARTHUR RICHARD BOLIN AND JOHN BARTOW GOFF, OF CORDELE, GEORGIA; SAIDGOFF ASSIGNOR TO HENRY H. BOLIN, OF OORDELE, GEORGIA.

LlFTlNG-JACK.

SPECIFICATION forming part of Letters Patent No. 745,142, dated November24, 1903.

Application filed April 10, 1903. Serial No. 152,034. (No model.)

To all whom it may concern:

Be it known that we, ARTHUR RICHARD BoLIN and J OHN BARTOW GoFF,citizens of the United States, and residents of Oordele, in the countyof Dooly and State of Georgia, have invented a new and usefulImprovement in LiftingJacks, of which the following is a specification.

Our invention relates to an improvement in lifting-jacks, and is devisedmore particularly for usein removing brasses from car journalboxes, andthe intention is to save time and laborin short, make provision wherebyone man can accomplish what it has required two to do heretofore.

With these objects inview our invention consists in certain novelfeatures of construction and combinations of parts, which will behereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view showing our improvedjack in working position, and Fig. 2 is a side view with parts brokenaway to show the interior construction.

A represents the base of the jack, and 1 is the screw, having the usualhead 2 swiveled thereon and provided with holes 3 3 to receive the bar4, by which the screw is operated.

B indicates a dog hinged to the base A and provided with adownwardly-extending nose 5 at its outer end, which is adapted to engagethe wheels 0 of the car, a pawl 6 being pivoted to the dog in positionto engage the ratchet-toothed bar 7, whereby to retain the dog down inengagement with the wheel.

We have illustrated the application of our improved lifting-jack in Fig.1, and in that view the parts are in position with the dog pressingdownward 'against the car-wheel to retain it in position on the rail andthe head screwed up against the lower side of the journal-box in theposition of lifting the latter from its normal position. Heretofore theprincipal difficulty encountered in this work of removing brasses fromcar journal-boxes has been the holding down of the wheel while the carwas being jacked up, which required the services of at least one man.Our improved lifting-jack effectually dispenses with this additionallabor, the dog operating to hold the wheel down in place upon the railwhile the box is sufliciently raised to relieve the pressure uponthebrass to admit ofits being removed, thusenabling one operator to 5 5 dothe entire work of removing the brasses from a given wheel. The jackitself is operated in the usual way, as will be readily understood fromthe construction illustrated.

Thus it will be seen that a great saving is ef- 6o fected in both timeand labor over the old method, with a corresponding saving of expense.

It is evident that slight changes might be resorted to in the form andarrangement of the several parts described without departing from thespirit and scope of our invention,

head, of a pivoted dog and automatic means for retaining it downward indifferent posi-* tions accordingly as set by the operator.

2. The combination with a base, and liftinghead, of a pivoted dog andmeans carried by the dog which operates automatically to retain the dogdownward in looking position.

3. The combination with a base having teeth, of a gravity-dog pivotedthereto, and a gravity-pawl pivoted to the dog and adapted to engagethe'teeth of the base and lock the dog downward, and alifting-jackadjustably connected with the base.

In testimony whereof we have signed this specification in the presenceof two subscribing witnesses.

ARTHUR RICHARD BOLIN. JOHN BARTOW GOFF.

Witnesses:

M. H. HIOKSON, GEO. D. BOLIN.

